/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ververica.flink.training.exercises.custom;

import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.common.typeutils.TypeSerializerSchemaCompatibility;
import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot;
import org.apache.flink.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;
import org.apache.flink.formats.avro.typeutils.AvroSerializer;

import com.ververica.flink.training.exercises.avro.AggregatedSensorStatistics;

/** Serializer configuration snapshot for POJO and format evolution. */
public final class AggregatedSensorStatisticsSerializerSnapshotV2
        implements TypeSerializerSnapshot<AggregatedSensorStatistics> {
    @Override
    public int getCurrentVersion() {
        return 1;
    }

    @Override
    public TypeSerializerSchemaCompatibility<AggregatedSensorStatistics> resolveSchemaCompatibility(
            TypeSerializer<AggregatedSensorStatistics> newSerializer) {
        if (newSerializer instanceof AggregatedSensorStatisticsSerializerV2) {
            return TypeSerializerSchemaCompatibility.compatibleAsIs();
        } else if (newSerializer instanceof AvroSerializer) {
            return TypeSerializerSchemaCompatibility.compatibleAfterMigration();
        } else {
            return TypeSerializerSchemaCompatibility.incompatible();
        }
    }

    @Override
    public TypeSerializer<AggregatedSensorStatistics> restoreSerializer() {
        return new AggregatedSensorStatisticsSerializerV2();
    }

    @Override
    public void writeSnapshot(DataOutputView out) {}

    @Override
    public void readSnapshot(int readVersion, DataInputView in, ClassLoader userCodeClassLoader) {}
}
